Wave mechanics:
Matter wave
Wave-particle duality
Wave equation
Wave function
Quantum mechanics
Atomic physics
Molecular physics
Condensed matter physics
Quantum information science, etc
Fluid Mechanics:
Hydrodynamics (ideal liquid motion, viscous liquid motion, cavitation, multiphase flow, non-Newtonian fluid motion, free surface flow, pressure flow, hydroelastic problems)
Gas dynamics (high temperature gas dynamics, rarefied gas dynamics, cosmic gas dynamics)
Aerodynamics (low speed aerodynamics, high speed aerodynamics)
Physico-chemical fluid mechanics (flow of dispersed system, interfacial and capillary motion, fluid motion in electric field)
Plasma hydrodynamics (single particle motion, wave, instability, arc relaxation, transport and radiation phenomena)
Fluid mechanics (complex multi-phase flow phenomena, high speed amphibious vehicles and their above-water propulsion systems, turbine and compressor optimization, hydraulic transmission systems)
Engineering fluid mechanics (hydrostatics, mechanical motion of fluids, equilibrium of fluids)
Multiphase fluid mechanics (gas-liquid flow, liquid-solid flow, gas-solid flow, fluid-solid flow)